Isolate ValidNameNativeBridge_test.

The test depends on static state that cannot be reset and is
modified by other tests. Upstream googletest sorts the tests
before running them, so it's no longer possible to control the
order of tests via the order of the srcs attribute.

Bug: 302771018
Test: art/libnativebridge/tests/runtests.sh
Change-Id: If6b96049f6ed7a276ca1dcd0d7a70966d7ffecbf